please help, I feel like it's missing something and I've been trying to fix it but I have no idea what's wrong, if anyone knows what might help please let me know, All of my art is very open to critique/advice :)

Anyways, I'm trying to fix this issue I have where I literally just draw my main character and no one else... cause drawing anyone else causes me agony haha, but I'm trying, the only reason drawing Rhodonite is so easy now is after I drew him a hundred times lol, so now I just need to do that with all my characters right?